package com.dtx.JavaBasic.switStruct;

import java.util.Scanner;

/**
 * 从键盘上分别输入年，月，日，判断这一天是当年的第几天
 *
 * 注：判断一年是否是闰年的标准
 *      1）可以被4整除，但不可以被100整除
 *  或
 *      2）可以被400整除
 */
public class SwitchCaseTest4 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入year: ");
        int year = scan.nextInt();
        System.out.println("请输入month：");
        int month = scan.nextInt();
        System.out.println("请输入day：");
        int day = scan.nextInt();

        //定义一个变量来保存总天数
        int sumDays = 0;
        switch (month){
            case 12:
                sumDays += 30;
            case 11:
                sumDays += 31;
            case 10:
                sumDays += 30;
            case 9:
                sumDays += 31;
            case 8:
                sumDays += 31;
            case 7:
                sumDays += 30;
            case 6:
                sumDays += 31;
            case 5:
                sumDays += 30;
            case 4:
                sumDays += 31;
            case 3:
                //判断year是否是闰年
                if((year % 4 == 0 && year % 100 != 0) || year % 400 == 0){
                    sumDays += 29;
                }else {
                    sumDays += 28;
                }
            case 2:
                sumDays += 31;
            case 1:
                sumDays += day;
        }

        System.out.println("2019年" + month + "月" + day + "日是当年的第" + sumDays + "天");
    }
}
